Components of Equity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 2,086,331	$ 2,032,570
Exercise of stock options	7,892	10,929
Shares repurchased under provisions of stock repurchase plans	(226,725)	(17,681)
Stock compensation expense	10,294	11,005
Tax benefits from stock plans, net	489	934
Net earnings	84,195	80,610
Other comprehensive (loss) income	(2,377)	(10,013)
Distributions to noncontrolling interest	(85)
Purchase of noncontrolling interest		(3,733)
Ending Balance	1,960,014	2,104,621
Shareholders' Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,084,783	2,027,699
Exercise of stock options	7,892	10,929
Shares repurchased under provisions of stock repurchase plans	(226,725)	(17,681)
Stock compensation expense	10,294	11,005
Tax benefits from stock plans, net	489	934
Net earnings	83,824	80,315
Other comprehensive (loss) income	(2,426)	(9,999)
Purchase of noncontrolling interest		(507)
Ending Balance	1,958,131	2,102,695
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	1,548	4,871
Net earnings	371	295
Other comprehensive (loss) income	49	(14)
Distributions to noncontrolling interest	(85)
Purchase of noncontrolling interest		(3,226)
Ending Balance	$ 1,883	$ 1,926